<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/jquery-3.6.0.min.js"></script>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        .wrap {
            width: 400px;
            height: 400px;
            background-color: #f00;
            margin: 100px;
            overflow: hidden;
            position: relative;
        }

        .sub {
            width: 200px;
            height: 200px;
            background-color: blue;
            margin: 100px;
            overflow: hidden;
            position: relative;
        }

        .box {
            width: 100px;
            height: 100px;
            background-color: yellow;
            padding: 5px;
            margin: 50px;

        }
    </style>
</head>

<body>
    <div class="wrap">
        <div class="sub">
            <div class="box"></div>
        </div>
    </div>
</body>
<script>
    // offset()   返回匹配的元素相对于文档左上角的偏移 => {left,top}

    console.log($(".box").offset());
</script>

</html>